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Spectrometric gamma measurements carried out on rock cores of shale formations belong to standard petrophysical analyses. The paper presents the work performed to improve the possibilities of recording natural gamma radiation on cores. The performed work was related to the modification of a gamma logger device, creating calibration standards and developing new computer software to calculate real element...
Precise knowledge of the concentration of radioactive elements can be applied for lithological identification of the rocks, particularly for identifying shale layers. Those rocks are characterised by a high natural radioactivity, due to the presence of clay minerals as well as organic matter. The presence of the organic matter significantly increases the concentration of uranium. It is therefore a...
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